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10-4. System configuration
・Unit code and the maximum number of connectable units
Unit type
Main unit
Outdoor unit
Sub unit
Indoor unit
Main
BC controller
Sub
Remote controller
Transmission booster unit
* A transmission booster may be required depending on the number of connected indoor units. The outdoor unit does not support PAC-SF46EPA but PAC-SF46EPA-G only.
* The outdoor units in the same refrigerant circuit are automatically designated as OC and OS. The outdoor units are designated as OC and OS in the order of capacity from large to small (if two
or more units have the same capacity, in the order of address from small to large).
・System configuration example
* The numbers in the parentheses in the figures below indicate address numbers.
(1) When ME remote controllers are connected
* Move the power jumper from CN41 to
CN40. *
1
* SW5-1: ON *
2
* Leave the power jumper connected to
CN41.
* SW5-1: ON *
2
Shielded cable
Ⓐ
Ⓑ
Sub remote controller
Ⓒ
System controller
*1 When a power supply unit is not connected to the centralized control transmission cable, move the power jumper from CN41 to CN40 on only one of the outdoor units (except 208-230
V model). When the System controller is connected to TB7 side and 208-230 V outdoor unit model is used, connect a power supply unit to TB7 side. If a power supply unit cannot be
used, connect the System controller to TB3 side. Up to three System controllers can be connected to TB3 side.
*2 If a system controller is used, set SW5-1 on all of the outdoor units to ON.
*3 BC, BS
Maximum allowable length of control cables
Transmission cables via outdoor units
Transmission cables
Remote controller cables
*4 When extending the length of the transmission cables to 1000 m (3280 ft), consult your dealer.
WT09117X05
Code
OC
–
OS
–
IC
1 to 50 units per OC (depends on the unit model)
1 unit per OC
BC
0 to 11 units per OC
BS
RC
0 to 2 units per group
RP
0 to 2 units per OC
OC
*3
CN41 CN40
BC
(51)
(52)
TB02
M1 M2 S
TB3
M1M2
M1M2 S
TB7
Ⓐ
L
3
OC
*3
BC
CN41
CN41
(53)
(54)
TB02
M1 M2 S
TB3
M1M2
M1M2 S
TB7
Ⓒ
A B S
L
+ L
1
L
, L
1
ℓ
, ℓ
1
2
* If the length exceeds 10 m (32 ft), the length that exceeds 10 m (32 ft) needs to be included in the
maximum allowable length of transmission cables above.
GB-32
Number of connectable units
L
1
Group 1
Group 3
IC
IC
(01)
(04)
TB5
TB5
M1 M2 S
M1 M2 S
A B
(101)
ME
IC
IC
(03)
(02)
TB5
TB5
M1 M2 S
M1 M2 S
A B
(103)
ME
+ L
+ L
, L
+ L
+ L
+ L
, L
+ L
+ L
2
3
4
1
2
3
5
1
2
+ L
, L
+ L
, L
, L
+ L
≤ 200 m (656 ft)
3
4
3
5
6
2
6
, ℓ
, ℓ
≤ 10 m (32 ft)
3
4
Group 5
IC
*3
BS
(55)
(05)
TB02
M1 M2 S
TB5
M1 M2 S
3 3 3
A B
A B
(105)
(155)
ME
ME
Ⓑ
L
4
IC
(07)
TB5
M1 M2 S
≤ 500 m (1640 ft)
6
IC
(06)
TB5
M1 M2 S
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